The Sacramento Kings’ game against the Atlanta Hawks on Thursday began with almost no one in the stands. Protestors in the area put the team’s arena, Golden 1 Center, on lockdown, preventing any fans from entering.

Protestors gathered for Stephon Clark, an unarmed African-American man who was shot and killed by Sacramento police officers Sunday while in his grandparents’ backyard. Video of the shooting was released Thursday, in which officers fired 20 rounds at Clark believing he had a gun. A search revealed officers mistook Clark’s iPhone for a firearm.

“Tonight’s game began with a delay. Due to law enforcement being unable to ensure ticketed fans could safely enter the arena, the arena remains closed and we ask fans outside to travel home. We will issue further information soon regarding a refund.”